Motor.



W. S. ELLIOTT.

MOTOR.

APPLICATION FILED 111111.20, 1911.

Patented Feb. 11, 1913.

W4 5 53;; k 631W 1 a 'sion chamber of the motor.

WILLIAM S. ELLIOTT, 0F PITTSBURGH, PENNSYLVANIA.

MOTOR.

Specification of Letters Patent.

Patented Feb. 11, 1913.

Application filed March 20, 1911. Serial No. 615,599.

To all whom it mag concern:

Be it known that I, WILLIAM S. ELLIo'i'r, of Pittsburgh, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Motors, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal section of the motor embodying my invention; Figs. 2 and 3 aresections taken on the lines IIII and llI-lll respectively of Fig. 1; and Figs. 4- and 5 are perspective views showing portions of different forms of tie bolts which may be employed.

My invention has relation to motors operated by fluid pressure, and is designed to provide an efficient motor of this type having its parts of simple construction and capable of being readily assembled and taken apart; also to provide means of simple and etfective character for firmly securing the parts together when the motor is in operation.

In the drawings, the numeral 2 designates a motor casing which, in the present in-' stance, is of circular form in cross-section. At the rear end the casing has the projecting, interiorly threaded flange 3 to receive the threaded flange 4 of the cap 5. This cap has the interiorly threaded boss 6 to form a pipe or hose coupling connection. The casing is formed with the solid interior rear portion '7, which is provided with a bearing cavity for the rear journal of the piston shaft 8,

9 is a head removably seated within the open forward end of the casing; and 10 is a cylinder removably seated between the head 9 and the solid rear portion 7. This'solid rear portion 7 forms a relatively fixed partition at the front of the supply'or admis- The removable head 9 is formed with a bearing opening extending therethrough and having a bushing 11. The cylinder 10 is open at both ends, and has a piston chamber 12.

3 is an admission port in the wall of the cylinder 12 and communicating with the piston chamber by cross-ports 14.

15 is an exhaust port communicatingwith the piston chamber by cross-ports 16.

17 is an admission chamber within the rear end of the cylinder and the cap 5, and which communicates with the admission port 13 by a port 18 (shown in dotted lines), extending through the solid portion 7 of the casing. The removable front head 9 is formed with an exhaust port 19 (also shown in dotted lines), which communicates with exhaust port 15.

The piston shaft 8 is formed with journal portions at each end, the front journal portion having a bearing in the bushin 11, and the rear journal portion havin a ing in the bushing 11*. The centra portion 8 of said shaft, within the piston chamber 12 is slotted to seat the piston blade 20. The shaft .8 is preferably provided at each end of the piston 'portion 8 with a collar or shoulder 21. These collars or shoulders have a thrust engagement with the inner ends of the respective bushings 11 and 11.

The cylinder andfront head are secured in place within the casing by means of the tie bolts 22, which extend through the front head, the cylinder and the solid portion of the rear head 7 having a threaded engagement with the latter. The threaded ends of the bolts project through into the admission chamber 17, and are flattened off at one or more sides, as shown in Figs. 4 and 5, to be engaged by the flange of the cap 5. "Vhcn these bolts are seated, and'the ca 5 has been screwed in, it forms an effective lock for the bolts, which prevents their working loose in use.

The rear end of the bushing ll -is shown as chamfered to form a small air space or chamber 23, which is connected by a passage 24 with the exhaust port 15 of the cylinder. This chamber is provided to take care of any fluid which leaks past the rear journal, and to provide for its escape, thereby relieving the shaft from end pressure. This chamber and passage is also of advantage in that it provides for the escape of sufiicient air or steam around the rear shaft bearing to maintain the proper lubrication of such bearing, oil being introduced into the piston chamber of the motor with the air or steam.

The motor chamber or cylinder 10 is closed by the integral rear head and the removable front head. The blade 20 is in contactwith these heads and in consequence face, the use of removable Wear plates is not necessary as in other types of motors.

It will be readily seen that the several parts of the motor are of such construction that they may be readily manufactured and assembled; that-the motor may be readily taken apart for renewal or repair of the parts, and that the entire construction is an exceedingly simple one.

I do not wish to limit myself to the precise construction and arrangement of the parts which Ihave herein shown and described, since it is obvious that changes may be made in the details thereof without departing from the spirit and scope of my invention as defined in the appended claims.

What I claim is 1. A motor comprising an outer casing having an integral rear bearing portion, a removable front bearing portion, a separate cylinder member between said bearing port1ons,said cylinder member and front bearing portion being removable through the front end of the casin securing means for the removable front iiearing portion and cylinder member extending to the rear end of the motor, and means at the rear end of the motor for locking the securing means;

' substantially as described.

.,2.' A motor, a casing having a relatively fixed rear bearing portion, a removable front'bearing portion, a separate cylinder member between the bearing portions, said removable bearing portion and cylinder member being removable through the front end of the casing, a plurality of tie bolts extending from the front end of the motor through the removable bearing, the cylinder member and the rear bearing,- and a coupling member secured to the casing and aving a lockin engagement with said bolts; substantial y as described.

3. A motor comprisin a casing having a fixed head and a remova le head, said heads containing bearings for the rotary element of the motor, a cylinder interposed between the heads and surrounded by the casing, and tie bolts extending through the removable head and the cylinder wall into and through the fixed head, and a removable end member which engages the ends of all the bolts and locks them against withdrawal; substantially as described.

4. A motor having an integral rear bearing portion, a removable front bearing portion, a se arate cylinder member intermediate the bearing portions, a piston shaft j ournaled in said bearing portions and having front and rear thrust collars or shoulders, a plurality of tie bolts extending throu h the removable bearing, the piston and t e rear bearing, and a coupling mem ber engaging and securing said bolts; substantially as described.

5. In a motor, a casing having a rear nonremovable partition separating the supply chamber from the motor chamber, a passage way leading from the supply chamber to the motor chamber, and a removable cylinder member within the motor chamber having an admission port communicating with the passage way leading from the supply chamber, the cylinder member being removable through the front ead; substantially as described.

6. In a motor, a casing having a rear nonremovable' partition separating the supply chamber from the motor chamber, a passage way leading from the supply chamber to the motor chamber, a removable cylinder member within the'motor chamber, having an admission port communicating with the passage way leading from the supply chamber, the cylinder member being removable through the front end, and means for closing the front end of the cylinder; substantially as described.

7 In a motor, a casing having a rear non- -removable partition separating the supply chamber from the motor chamber, a passage way leading from the supply chamber to the motor chamber, a removable cylinder member within the motor chamber, having an admission port communicating with the passa e way leading from the supply chamber, t e cylinder member being removable through the front end, means for closing the front end of the cylinder member, and means for locking the closing means .in place; substantially as described.

8. A motor, comprising a casing having an integral head at its rear end provided with a rear shaft bearing, a removable head at its front portion and provided with a front shaft bearing, an open end cylinder member inserted within the casing or shell between the front and rear heads, the rear head and the cylinder having an alined supply port and the cylinder and both heads having alined bolt openings,= together with 

